CN215912023U - Power module output noise suppression structure - Google Patents
Power module output noise suppression structure Download PDFInfo
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- CN215912023U CN215912023U CN202121815310.0U CN202121815310U CN215912023U CN 215912023 U CN215912023 U CN 215912023U CN 202121815310 U CN202121815310 U CN 202121815310U CN 215912023 U CN215912023 U CN 215912023U
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- power module
- module body
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- noise suppression
- magnetic ring
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Abstract
The patent introduces a noise suppression structure at the output end of a power supply module, which comprises a power supply module body, an input filtering enhancement assembly, a magnetic ring and an output filtering enhancement assembly; the input end and the output end of the power module body are respectively and vertically welded with contact pins, the input filtering assembly is arranged on the contact pins at the input end of the power module body, the magnetic ring sleeve is arranged on the contact pins at the output end of the power module body, and the output filtering reinforcing assembly is arranged on the contact pins at the output end of the power module body on the upper side of the magnetic ring. The utility model has simple structure and reasonable design, not only reduces the occupied space of the device layout structurally, but also cooperates with the magnetic ring sleeved on the pin at the output end to form a pi-type filter circuit functionally, the filter performance is superior to that of a C-type filter circuit, the ripple noise suppression is obvious, and the ripple noise suppression of 10-20mv is realized.
Description
Technical Field
The utility model relates to the technical field of power modules, in particular to a noise suppression structure for an output end of a power module.
Background
The power supply module has low ripple noise which is one of important performance indexes, and all the power supply modules have higher requirements on low noise and low ripple; in order to make the low ripple noise of the power supply module meet the requirements, a reliable noise suppression device is required; the traditional power module realizes output filtering mainly by means of device layout on a printed board, a peripheral output filter circuit is built, a C-type filter circuit shown in figure 4 is formed, for example, the output end of the module is connected with a proper capacitor and a proper filter inductor in a matching mode, ripple noise in a certain range can be eliminated, and the traditional noise suppression device is large in board layout, complex in structure and unobvious in noise suppression effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, and provides a noise suppression structure for the output end of a power supply module, which has a simple structure and a reasonable design and can effectively reduce output ripple noise.
The technical scheme adopted by the utility model is as follows:
a noise suppression structure of an output end of a power supply module comprises a power supply module body, an input filtering enhancement assembly, a magnetic ring and an output filtering enhancement assembly;
the input end and the output end of the power module body are respectively and vertically welded with contact pins, the input filtering assembly is arranged on the contact pins at the input end of the power module body, the magnetic ring sleeve is arranged on the contact pins at the output end of the power module body, and the output filtering reinforcing assembly is arranged on the contact pins at the output end of the power module body on the upper side of the magnetic ring.
Specifically, the input filter reinforcing component comprises a printed board arranged on a contact pin at the input end of the power module body in a penetrating mode, and two capacitors connected in parallel are arranged on the printed board.
Specifically, the output filtering reinforcing component comprises a printed board arranged on a contact pin at the output end of the power module body in a penetrating mode, and a capacitor and a voltage stabilizing tube which are connected in parallel are arranged on the printed board.
Specifically, the contact pin is a pure copper contact pin.
Specifically, the inner wall of the magnetic ring is connected with the outer edge of the contact pin in an adhesive manner.
Due to the adoption of the technical scheme, the utility model has the following advantages:
the structure for suppressing the noise at the output end of the power supply module is simple in structure and reasonable in design, the input filter strengthening component and the output filter strengthening component are welded with the power supply module body in a stacked mode, the occupied space of device layout is reduced in the structure, the input filter strengthening component and the output filter strengthening component are matched with the magnetic ring sleeved on the pin of the output end in function to form a pi-shaped filter circuit, the filter performance is superior to that of a C-shaped filter circuit, the ripple noise suppression is obvious, and the ripple noise suppression of 10-20mv is realized; and the size of the magnetic ring and the pure copper contact pin is adjustable, so that the magnetic ring and the pure copper contact pin are convenient to implement and apply on various circuits, and particularly the magnetic ring and the pure copper contact pin are used for the circuits with limited layout space and strict requirements on ripple noise indexes.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an overall schematic view in another direction of the present invention.
Fig. 3 is a schematic view of the connection between the pin and the magnetic ring according to the present invention.
Fig. 4 is a schematic diagram of a type C filter circuit.
Fig. 5 is a schematic diagram of a pi filter circuit.
In the figure, 1-power module body, 2-pin, 3-input filter strengthening component, 4-magnetic ring, 5-output filter strengthening component.
Detailed Description
The utility model is further explained below with reference to the drawings and examples, without thereby limiting the scope of protection of the utility model, which is disclosed with the aim of protecting all technical modifications within the scope of the utility model.
The structure for suppressing noise at the output end of a power module shown in fig. 1-5 comprises a power module body 1, an input filter enhancing component 3, a magnetic ring 4 and an output filter enhancing component 5.
The input end and the output end of the power module body 1 are respectively and vertically welded with a pure copper contact pin 2, the input filter component is arranged on the contact pin 2 at the input end of the power module body 1, the input filter strengthening component 3 comprises a printed board which is arranged on the contact pin 2 at the input end of the power module body 1 in a penetrating way, and two capacitors which are connected in parallel are arranged on the printed board; the magnetic ring 4 is sleeved on the contact pin 2 at the output end of the power module body 1; the output filtering reinforcing component 5 is arranged on a contact pin 2 at the output end of the power module body 1 on the upper side of the magnetic ring 4, the output filtering reinforcing component 5 comprises a printed board which is arranged on the contact pin 2 at the output end of the power module body 1 in a penetrating mode, and a capacitor and a voltage stabilizing tube which are connected in parallel are arranged on the printed board.
The working principle of the power supply module noise suppression structure device is as follows:
an input filtering strengthening component 3 is stacked and welded on a contact pin 2 at the input end of the power module, and the input voltage is filtered to provide a stable input voltage value for a power management chip and other circuits in a circuit behind; the magnetic rings 4 are respectively sleeved on the contact pins 2 at the output end of the power supply module, matched with the output filtering strengthening components 5 which are stacked and welded on the upper sides of the magnetic rings 4, and after the output voltage is filtered by a capacitor, a voltage is stabilized by a voltage stabilizing tube and is sent to a back-end circuit; the output filtering strengthening component 5 and the contact pin 2 form a pi-type filter circuit, the input and the output of the pi-type filter circuit are low in impedance, and the insertion loss characteristic of the pi-type filter circuit is better than that of the traditional RC and LC types.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the utility model, are presently considered to be suitable, it being understood, however, that the utility model is intended to cover all variations and modifications of the embodiments falling within the scope of the inventive concept and the utility model.
Claims (5)
1. The utility model provides a power module output noise suppression structure which characterized in that: the power supply module comprises a power supply module body, an input filtering enhancement assembly, a magnetic ring and an output filtering enhancement assembly;
the input end and the output end of the power module body are respectively and vertically welded with contact pins, the input filtering assembly is arranged on the contact pins at the input end of the power module body, the magnetic ring sleeve is arranged on the contact pins at the output end of the power module body, and the output filtering reinforcing assembly is arranged on the contact pins at the output end of the power module body on the upper side of the magnetic ring.
2. The power module output noise suppression structure of claim 1, wherein: the input filter strengthening component comprises a printed board arranged on a contact pin at the input end of the power module body in a penetrating mode, and two capacitors are welded on the printed board in a parallel mode.
3. The power module output noise suppression structure of claim 1, wherein: the output filtering reinforcing component comprises a printed board which is arranged on a contact pin of the output end of the power module body in a penetrating mode, and a capacitor and a voltage stabilizing tube are welded on the printed board in parallel.
4. The power module output noise suppression structure of claim 1, wherein: the contact pin is a pure copper contact pin.
5. The power module output noise suppression structure of claim 1, wherein: the inner wall of the magnetic ring is connected with the outer edge of the contact pin in an adhesive manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121815310.0U CN215912023U (en) | 2021-08-05 | 2021-08-05 | Power module output noise suppression structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121815310.0U CN215912023U (en) | 2021-08-05 | 2021-08-05 | Power module output noise suppression structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215912023U true CN215912023U (en) | 2022-02-25 |
Family
ID=80290764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121815310.0U Active CN215912023U (en) | 2021-08-05 | 2021-08-05 | Power module output noise suppression structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215912023U (en) |
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2021
- 2021-08-05 CN CN202121815310.0U patent/CN215912023U/en active Active
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